Penises that appear abnormally small, but on palpation appear to have normal shaft w/normal stretched length are most of the time diagnosed w/: 1. buried penis, 2. webbed penis, 3. trapped penis or 4. micropenis All of these **most of the time** caused at circumcision.
Penis size varies w/ethnic background, at times, that also could be a factor & something that you should think about. Now, I'm getting into adult conversation here, these are ADULT figures, but here is some information according to Andro Medical the following sizes are averages found from country to country:
France – average erect size equals 16cm, or 6.3 inches
Italy, Russia – average erect size equals 15cm
Mexico – 14.9cm
Germany – 14.4cm
Spain – 13.6cm
Japan – 13cm
United States – 12.9cm, or 5.1 inches when erect
Saudi Arabia – 12.4cm
India – 10.1cm
Korea – 9.6cm
Ethnic Origin plays a greater role in penis size than geographic locale. It’s been said that Black men are generally better endowed than Caucasian men. Some facts bear this out w/ the average black man having a penis size almost 1 centimeter in length greater than an average Caucasian man. Generally, Asian men or North American Indians are less in length than black or white men.
I would suggest talking to the pediatrician about your concerns & maybe seeing a urologist. If you would like more information on the conditions I listed above, please let me know. I hope this winded reply was of some help.
Best of Luck :)